Socket casing



Aug. 2, 1927.

A. c. RECKER SOCKET CASING Filed D60. 14, 1925 5 Inventor Adolph C Hacker y Patented Aug. 2, 1927.

UhlETED srrss nnonrn o. nnoxnn, or oanvrnnn, connnorrcutr, assrenon T0 CHASE COMPANIES,

Inc, or WATERBURY, oonnnc'rrcn'r, CORPORATION.

sooxn'r oAsrNe.

Application filed December 14, 1925. Serial No.. 75,367.

Fig. 1 is a view in side elevation of a socket-casing constructed in accordance with my Fig. 6 is a broken, sectional view on theline 6-6 of Fig.2.

Fig. 7 is acorresponding view on the line 77 of Fig. 2.

My invention relates to an improvement in socket easings for electric installation, with particular reference to the means em ployed for coupling the caps and shells of such casings together, so that they may be readily engaged and disengaged, the object being to produce a simple, convenient and effective socket-casing of thecharacter described.

With these ends in view. my invention consists in a socket-casing characterized by having the cap and shell. thereof corrugated around their perimeters parallel with their axes as will be hereinafter particularly described and pointed out in the claims.

In carrying out my invention, as herein shown, the skirt 10 of the cap 11 is formed about its perimeter and just above its flared edge 12 with a series of similar. spaced, struck-up corrugations parallel with the axis of the cap, and producing substantiallystraight inset reaches 13 and alternating, substantially semi-circular outwardly-set sockets 14c the junction of the said reaches and sockets forming angular locking abutments 24. The shell 15 of the casing is formed about its perimeter with struck-up corrugations parallel with its axis. produc' in: in-set substantially-straight reaches 16 and substantially semi-circular outwardlyset flutes 17 The said corrugations of the cap and shell are equal in number and proportioned so as to register with each other when the shell is introduced into the cap. lVhen the corrugations ofthe cap and shell are so inter-engaged. as shown in Fig. 2, the locking-abutments 24 of the cap engage with and abut against the side-walls of the outwardly-set flutes 17 of the shell, so as to re sist the relative rotary movement of the cap and shell under normal conditions of: use, there being practically no yielding of the shell with respect to the cap in the direction of rotation. Thereformby providinghoth the cap and theshell with corrugations of the character described, I am enabled to guard against the accidental relative rotation of thecap and shell when the socket-casing 1s being installed, without providing the socket-easing with any means for positively locking its ,cap and shell against rotation. Furthermore, the provision of the skirt of the cap with relatively long corrugations operates to produce the flare 12. of the skirt, whereby the sameis made enough larger in diameter than the diameter of the shell to facilitate the introduction ot the latter into the former, which greatly adds to the con venience in installing thefiXt-ure.

To provide for the positive locking of the cap and shell together against longitudinal separation, I strike a locking-nib 18 inwardly from each of the in-set reaches 13 of the cap, these lockingr-nibs'being formed so as to present cut-edges 19 facins'toward the erown otthe cap and extending transversely to the axis thereof. To co-actwith the, lockinrr-nibs 18' of, the cap, the shell 15 is provided with two pairs of similar. oppositely-located locking-nibs 20 struck outwardly from two pairs of the in-set reaches 16 of its corrugations. The cut-edges 21 of these nibs 20 stand at a right angle to the axis of the shell and face toward the body thereof.

When the shell 15 is introduced into the cap '11, its edge yields to permitthe locking-nibs 20 to snap over certain of the locking-nibs 18, depending upon their relative rotative positions of the cap and shell at the time of such introduction, whereby the cap and shell are positively located together against longitudinal separation. To provide 7 for separating the cap and shell, the latter is provided with a deep, longitudinal slot 22, so that, by pressing; the shell inward at or about the point 23, which is adjacent to the said slot and also adjacent to the pair of nihs 20 adjacent to the slot. the same are disengaged from the two locking-nibs 18 of the cap, with which they were engaged when the shell was introduced thereinto. When the locking-nibs now under discussion are separated, the cap and shell may be rocked relatively to each other so as to disengage the opposite pair of locking-nibs of the shell from the locking-nibs of the cap with which they happen to be engaged. The lockingnibs of the shell, of course, may be engaged with any of the nibs of the cap, as required by any individual installation of the socketeasing. For thispurpose, the cap is pro vided with a complete circle of locking-nibs, as described.

In addition to facilitating the introduction of the skirt into the cap the flare oi the skirt of the cap compensates for the pos sible deformation of the shell in the process of manufacture or at the time of its assembly with interior fittings, which are subject to slight variations.

I claim: i

1. In a socket-casing, the combination with a cap having its skirt encircled with corrugations producing substantiallystraight inset reaches and alternating substantially-circular outwardly-set sockets, of a shell having its edge formed with corrugations producing inset substantially-straight reaches and substantially semi-circular out wardly-set flutes, the junction of the said reaches and sockets in the cap forming angular l0cking-abutments which co-act with the side-Walls of the outwardly-set flutes of theshell to resist the relative rotary movement of the shell and cap under normal conditions of use.

2. In a socket-casing, the combination with a cap having its skirt encircled with corrugations producing substantiallystraight inset reaches and alternating substantially-circular outwardlyset sockets, of

a shell having its edge formed with corrugations producing substantially-straight inset reaches and substantially semi-circular outwardly-set flutes, the junction of the said reaches and sockets in the cap zlorining an gular locking-abutments which (o-act with i tive lock against the longitudinal separation v of the cap andshell. j

3. In socket-casing, the combination with a cap having its skirt encircled with corrugations producing substantiallystraight inset reaches and alternating substantially-circular outwardly-set sockets, of"

a shell having its edge formed with corrugastions producing inset-reaches and'substantially semi-circular outwardly-set flutes, the junction of: the said reaches'and sockets in the cap forming angular lockii'ig-abutmentswhich co-act with the side-walls of the outwardly-set flutes of the shell to resist the relative rotary movement of the shell and cap under normal conditions of use, and the shell-receiving edge otthe skirtof the cap being flared to increase its diameter over the diameter of the shell to "facilitate the introduction of the latter into the former.

In testimony whereof, I have signed this specification.

ADOLPH BECKER. 

